"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

SIMULATION OF CORONA DISCHARGE IN CONFIGURATIONS WITH A SHARP ELECTRODE

P Atten1,* , K. Adamiak2, B. Khaddour3,4, J.-L. Coulomb4

Affiliation

  1. Laboratoire d’Electrostatique et de Matériaux Diélectriques, CNRS-Univ. J. Fourier, Grenoble, France
  2. Dept. Electr. & Comp. Engineering, Univ. of Western Ontario, London, Ontario, Canada
  3. Laboratoire d’Electrostatique et de Matériaux Diélectriques, CNRS-Univ. J. Fourier, Grenoble, France
  4. Laboratoire d'Electrotechnique Grenoble, INPG/UJF-CNRS, Saint Martin d’Hères, France

Abstract

Three algorithms are presented to determine the distributions of electric potential and charge density in the case of an injected space charge in a gas. We consider electrode configurations characterised by a sharp electrode injecting charge from the restricted zone where the electric field takes very high values and induces a corona discharge. For the point-plane configuration with a needle having the shape of an axi-symmetric hyperboloid, a change of coordinates transforms the domain of integration into a rectangle, which facilitates the use of finite differences or finite volume methods. For a general axi-symmetric shape of the needle, a finite element method is used to solve the Poisson equation. In these two cases, an adapted method of characteristics makes it possible to solve the charge conservation equation in a way which does not smooth out very high lateral gradients of charge density. In a third approach developed first for the blade-plane electrode configuration, the mesh is redefined with each of the successive approximations. This technique also leads to predictions of current density profile on the plane very similar to the measured ones..

Keywords

Corona discharge, Electric potential, Charge density.

Submitted at: May 26, 2004
Accepted at: June 22, 2004

Citation

P Atten, K. Adamiak, B. Khaddour, J.-L. Coulomb, SIMULATION OF CORONA DISCHARGE IN CONFIGURATIONS WITH A SHARP ELECTRODE, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 3, pp. 1023-1028 (2004)